authentication errors handled

lib/app.dart

@@ -93,27 +93,61 @@ void _authListener(
       break;
     case AuthenticationStatus.signUpFailure:
       context.loaderOverlay.hide();
-      // TODO: implement error message
+      String errorMessage = '';
+      switch (state.error) {
+        case AuthenticationError.userAlreadyRegistered:
+          errorMessage =
+              'Email already registered.\nPlease use a different email or login.';
+          break;
+        case AuthenticationError.invalidCredentials:
+          errorMessage = 'Invalid data entered.\nPlease try again.';
+          break;
+        case AuthenticationError.unknown:
+          errorMessage = 'An unknown error occurred.\nPlease try again later.';
+          break;
+        default:
+          break;
+      }
+      final ctx = appRouter.routerDelegate.navigatorKey.currentContext;
+      if (ctx != null) {
+        showAuthenticationErrorDialog(ctx, errorMessage);
+      }
       break;
     case AuthenticationStatus.checkInFailure:
       context.loaderOverlay.hide();
-      // TODO: implement error message
+      String errorMessage = '';
+      switch (state.error) {
+        case AuthenticationError.checkInCodeExpired:
+          errorMessage =
+              'Check-in code has expired.\nPlease request a new code.';
+          break;
+        case AuthenticationError.checkInCodeNotFound:
+          errorMessage =
+              'Check-in code not found.\nPlease verify and scan again.';
+          break;
+        case AuthenticationError.unknown:
+          errorMessage = 'An unknown error occurred.\nPlease try again later.';
+          break;
+        default:
+          break;
+      }
+      final ctx = appRouter.routerDelegate.navigatorKey.currentContext;
+      if (ctx != null) {
+        showAuthenticationErrorDialog(ctx, errorMessage);
+      }
       break;
     case AuthenticationStatus.authenticationFailure:
       context.loaderOverlay.hide();
       String errorMessage = '';
       switch (state.error) {
-        case AuthenticationError.invalidCredentials:
-          errorMessage = 'Invalid credentials';
-          break;
         case AuthenticationError.userNotFound:
-          errorMessage = 'User not found';
+          errorMessage = 'Email not registered.\nPlease try again.';
           break;
-        case AuthenticationError.missingUserData:
-          errorMessage = 'Missing user data';
+        case AuthenticationError.invalidCredentials:
+          errorMessage = 'Invalid data entered.\nPlease try again.';
           break;
         case AuthenticationError.unknown:
-          errorMessage = 'Unknown error';
+          errorMessage = 'An unknown error occurred.\nPlease try again later.';
           break;
         default:
           break;

lib/data/errors/authentication_errors.dart

@@ -1,12 +1,15 @@
 /// Exception that occurs when the user is already registered
 class UserAlreadyRegisteredError implements Exception {}
 
+/// Exception that occurs when the user scan an invalid check-in code
+class CheckInCodeNotFoundError implements Exception {}
+
+/// Exception that occurs when the user scan an expired check-in code
+class CheckInCodeExpiredError implements Exception {}
+
 /// Exception that occurs when the credentials does not match anything on Firebase Auth
 class InvalidCredentialsError implements Exception {}
 
-/// Exception that occurs when the user data are missing
-class MissingUserDataError implements Exception {}
-
 /// Exception that occurs when a request is made without authentication
 class UnauthenticatedError implements Exception {}
 

lib/data/repo/authentication_repository.dart

@@ -27,7 +27,7 @@ class AuthenticationRepository {
       signOut();
       switch (response.error.code) {
         case 'user-not-found':
-          throw MissingUserDataError();
+          throw UserNotFoundError();
         default:
           throw UnknownAuthenticationError();
       }
@@ -66,7 +66,10 @@ class AuthenticationRepository {
 
     if (response.error.code.isNotEmpty) {
       switch (response.error.code) {
-        // TODO: handle errors
+        case 'code-not-found':
+          throw CheckInCodeNotFoundError();
+        case 'code-expired':
+          throw CheckInCodeExpiredError();
         default:
           throw UnknownAuthenticationError();
       }
@@ -91,7 +94,9 @@ class AuthenticationRepository {
       switch (e.code) {
         case 'user-not-found':
           throw UserNotFoundError();
+        case 'invalid-credential':
         case 'invalid-email':
+        case 'invalid-password':
         case 'wrong-password':
           throw InvalidCredentialsError();
         default:

lib/logic/cubit/authentication_cubit.dart

@@ -1,5 +1,6 @@
 import 'package:bloc/bloc.dart';
 import 'package:devfest_bari_2024/data.dart';
+import 'package:devfest_bari_2024/logic.dart';
 import 'package:equatable/equatable.dart';
 
 part 'authentication_state.dart';
@@ -53,9 +54,10 @@ class AuthenticationCubit extends Cubit<AuthenticationState> {
     );
 
     try {
-      _checkEmptyData(name, surname, email, password);
+      _checkSignUpEmptyData(nickname, name, surname, email, password);
 
-      _checkEmail(email);
+      InputValidators.checkEmail(email);
+      InputValidators.checkPassword(password);
 
       await _authRepo.signUp(
         nickname: nickname,
@@ -67,31 +69,44 @@ class AuthenticationCubit extends Cubit<AuthenticationState> {
 
       emit(state.copyWith(status: AuthenticationStatus.signUpSuccess));
       signInWithEmailAndPassword(email: email, password: password);
+    } on UserAlreadyRegisteredError {
+      emit(
+        state.copyWith(
+          status: AuthenticationStatus.signUpFailure,
+          error: AuthenticationError.userAlreadyRegistered,
+        ),
+      );
+    } on InvalidDataError {
+      emit(
+        state.copyWith(
+          status: AuthenticationStatus.signUpFailure,
+          error: AuthenticationError.invalidCredentials,
+        ),
+      );
     } on Exception {
-      emit(state.copyWith(status: AuthenticationStatus.signUpFailure));
+      emit(
+        state.copyWith(
+          status: AuthenticationStatus.signUpFailure,
+          error: AuthenticationError.unknown,
+        ),
+      );
     }
   }
 
-  void _checkEmptyData(
+  void _checkSignUpEmptyData(
+    String nickname,
     String name,
     String surname,
     String email,
     String password,
   ) {
-    final check = name.isNotEmpty &&
+    final check = nickname.isNotEmpty &&
+        name.isNotEmpty &&
         surname.isNotEmpty &&
         email.isNotEmpty &&
         password.isNotEmpty;
 
-    if (!check) throw Exception();
-  }
-
-  void _checkEmail(String email) {
-    var check = RegExp(
-      r"^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$",
-    ).hasMatch(email);
-
-    if (!check) throw Exception();
+    if (!check) throw InvalidDataError();
   }
 
   Future<void> checkIn(String authorizationCode) async {
@@ -108,11 +123,25 @@ class AuthenticationCubit extends Cubit<AuthenticationState> {
           status: AuthenticationStatus.checkInSuccess,
         ),
       );
-    } on Exception catch (e) {
-      print(e);
+    } on CheckInCodeNotFoundError {
+      emit(
+        state.copyWith(
+          status: AuthenticationStatus.checkInFailure,
+          error: AuthenticationError.checkInCodeNotFound,
+        ),
+      );
+    } on CheckInCodeExpiredError {
       emit(
         state.copyWith(
           status: AuthenticationStatus.checkInFailure,
+          error: AuthenticationError.checkInCodeExpired,
+        ),
+      );
+    } on Exception {
+      emit(
+        state.copyWith(
+          status: AuthenticationStatus.checkInFailure,
+          error: AuthenticationError.unknown,
         ),
       );
     }
@@ -132,23 +161,28 @@ class AuthenticationCubit extends Cubit<AuthenticationState> {
     );
 
     try {
-      final user = await _authRepo.signInWithEmailAndPassword(
+      _checkSignInEmptyData(email, password);
+
+      InputValidators.checkEmail(email);
+      InputValidators.checkPassword(password);
+
+      final userProfile = await _authRepo.signInWithEmailAndPassword(
         email: email,
         password: password,
       );
 
-      if (user.group.groupId.isEmpty) {
+      if (userProfile.group.groupId.isEmpty) {
         emit(
           state.copyWith(
-            userProfile: user,
+            userProfile: userProfile,
             status: AuthenticationStatus.checkInRequired,
             isAuthenticated: true,
           ),
         );
       } else {
         emit(
           state.copyWith(
-            userProfile: user,
+            userProfile: userProfile,
             status: AuthenticationStatus.authenticationSuccess,
             isAuthenticated: true,
           ),
@@ -161,18 +195,18 @@ class AuthenticationCubit extends Cubit<AuthenticationState> {
           error: AuthenticationError.userNotFound,
         ),
       );
-    } on InvalidCredentialsError {
+    } on InvalidDataError {
       emit(
         state.copyWith(
           status: AuthenticationStatus.authenticationFailure,
           error: AuthenticationError.invalidCredentials,
         ),
       );
-    } on MissingUserDataError {
+    } on InvalidCredentialsError {
       emit(
         state.copyWith(
           status: AuthenticationStatus.authenticationFailure,
-          error: AuthenticationError.missingUserData,
+          error: AuthenticationError.invalidCredentials,
         ),
       );
     } on Exception {
@@ -185,6 +219,15 @@ class AuthenticationCubit extends Cubit<AuthenticationState> {
     }
   }
 
+  void _checkSignInEmptyData(
+    String email,
+    String password,
+  ) {
+    final check = email.isNotEmpty && password.isNotEmpty;
+
+    if (!check) throw InvalidDataError();
+  }
+
   Future<void> signOut() async {
     emit(state.copyWith(status: AuthenticationStatus.signOutInProgress));
     await _authRepo.signOut();

lib/logic/cubit/authentication_state.dart

@@ -19,9 +19,11 @@ enum AuthenticationStatus {
 
 enum AuthenticationError {
   none,
+  userAlreadyRegistered,
+  checkInCodeNotFound,
+  checkInCodeExpired,
   userNotFound,
   invalidCredentials,
-  missingUserData,
   unknown,
 }
 

lib/logic/input_validators.dart

@@ -0,0 +1,18 @@
+/// Exception that occurs when the user enter invalid data into the form
+class InvalidDataError implements Exception {}
+
+class InputValidators {
+  static void checkEmail(String email) {
+    final check = RegExp(
+      r"^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$",
+    ).hasMatch(email);
+
+    if (email.isEmpty || !check) throw InvalidDataError();
+  }
+
+  static void checkPassword(String password) {
+    final check = password.length > 7;
+
+    if (!check) throw InvalidDataError();
+  }
+}